[j-nsp] 10GE xe-0/0/0 traffic anomaly

[Witold Koscielniak]

I have new m120 connected on stick to the Extreme switch.

           10GE
m120<-------------->summit<----->
  in=2 x out(??)   in=out


M120 has only one interface - xe-0/0/0 with many 802.1q subinterfaces.
So traffic on xe-0/0/0 should be exactly symmetrical (in/out = 1) but it is not!!

Mrtg shows that traffic on 10G summit is exactly symmetrical but on xe-0/0/0
is asymmetrical:

admin at Juniper_M120> monitor interface traffic
Interface    Link     Input bytes        (bps)      Output bytes        (bps)
  xe-0/0/0      Up  61944473131097 (318338324)    30951930138936 (156175948)

Input traffic is approximatly twice geater than output (in/out = 2).

What is happen? Why input traffic is greater than output traffic.
What doubled input traffic on xe-0/0/0?

Before installing M120 I had:

       LACP 2x1GE
m5<-------------->summit<----->
   <-------------->
  ae0

and everything was ok (in was eq out on ae0)!!!!

Any idea?


-- 
Witold Kościelniak
Network Administrator